Ice Mimicry – The being has a body composed of ice.
Iceman started out as a human that could manipulate ice but later become a being made of living ice and therefore much more invulnerable and much more powerful as Iron Fist finds out in AvX VS #6.
Ymir (Marvel) is probably the most powerful being with the ability to manipulate ice in the Marvel Universe (Official Handbook of the Marvel Universe V1 #12).
Glacier Man – Journey into Unknown Worlds V1 #55
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